//fender, can you support your assertion?//
I'll save fender the trouble: The UN convention on the Status of Refugees (1951), Article 31:
ARTICLE 31. REFUGEES UNLAWFULLY IN THE COUNTRY OF REFUGE
1. The Contracting States shall not impose penalties, on account of their illegal entry or presence, on refugees who, coming directly from a territory where their life or freedom was threatened in the sense of Article 1, enter or are present in their territory without authorization, provided they present themselves without delay to
the authorities and show good cause for their illegal entry or presence.
Note "...coming directly from a territory where their life or freedom was threatened in the sense of Article 1". People arriving from France are not under such a threat.
Those arriving from France are illegal immigrants, plain and simple, and are liable to penalties. The UK is currently under an invasion by such people. The answer to it is to prevent their entry, by force if necessary, into UK territorial waters. They are perfectly safe in France and under no threat. The UK is their "destination of choice" but the asylum system does not afford them that choice. Time to stop fannying around - in fact that time passed long ago.